Best explanation of a method to fight chronic pain:

Egoscue – An Explainer on Posture Therapy to Heal Body Pain
https://youtu.be/XRNy32pogQE

Quick exercises to do everyday, anywhere!
Egoscue – Anywhere Training Exercises
https://youtu.be/FdNS95hpL-o

Book: 

The Egoscue Method of Health Through Motion

MORE on posture

Dana Sterling on Posture and Chronic Pain at Life 360 Summit
https://www.youtube.com/watch?v=HcqfxPpwJOQ

Scoliosis & Chronic Pain a Fascia based approach
https://www.youtube.com/watch?v=xLTSA3f1yEw

Other helpful videos
How drawing helps you think
https://www.youtube.com/watch?v=ZqlTSCvP-Z0